diff --git a/Packages/ohif-viewerbase/client/index.js b/Packages/ohif-viewerbase/client/index.js
index 044ceb50f..e30cb933c 100644
--- a/Packages/ohif-viewerbase/client/index.js
+++ b/Packages/ohif-viewerbase/client/index.js
@@ -204,6 +204,14 @@ Viewerbase.ResizeViewportManager = ResizeViewportManager;
 import { StudyLoadingListener } from './lib/classes/StudyLoadingListener';
 Viewerbase.StudyLoadingListener = StudyLoadingListener;
 
+// StackLoadingListener
+import { StackLoadingListener } from './lib/classes/StudyLoadingListener';
+Viewerbase.StackLoadingListener = StackLoadingListener;
+
+// DICOMFileLoadingListener
+import { DICOMFileLoadingListener } from './lib/classes/StudyLoadingListener';
+Viewerbase.DICOMFileLoadingListener = DICOMFileLoadingListener;
+
 // StudyMetadata, SeriesMetadata, InstanceMetadata
 import { StudyMetadata } from './lib/classes/metadata/StudyMetadata';
 import { SeriesMetadata } from './lib/classes/metadata/SeriesMetadata';
diff --git a/Packages/ohif-viewerbase/client/lib/classes/StudyLoadingListener.js b/Packages/ohif-viewerbase/client/lib/classes/StudyLoadingListener.js
index 1c99bd5ae..267ef6af3 100644
--- a/Packages/ohif-viewerbase/client/lib/classes/StudyLoadingListener.js
+++ b/Packages/ohif-viewerbase/client/lib/classes/StudyLoadingListener.js
@@ -394,4 +394,4 @@ class StudyLoadingListener {
     }
 }
 
-export { StudyLoadingListener };
+export { StudyLoadingListener, StackLoadingListener, DICOMFileLoadingListener };